2021 BMW 740i xDrive Windshield Wiper Arm Replacement Cost

The windshield wiper arms hold the wipers in the correct position through the entire range of motion, and are geared on one end to accept the motor that drives the wipers. The other end has one of several clip designs, and the windshield wiper arm will attach firmly into this clip so that it sits between the windshield wiper arm and the windshield.

When the windshield wipers are activated, the switch sends a signal through the fuse, and possibly a relay, and power reaches the windshield wiper motors from one of two paths. When it reaches the windshield wiper motor, the motor will being moving back and forth as quickly as the driver has selected. When the wiper motor turns, the wiper arms, which are connected to the motor, and contain the wiper blades, move across the windshield causing the wiper blades to drag liquid off the glass.

Windshield wiper arms will be replaced mainly for aesthetic reasons or damage. If the windshield arms become bent or rusted, the windshield wipers may not contact the windshield at the proper angle, or there may be no contact at all. Also, the sun will take a toll on these parts after years of use, and fading or clear coat peeling will result, not to mention rust.

Driving without windshield cleaning components is not typically considered unsafe, but there will be no system to properly clean your field of vision if the need arises. If the windshield cleaning system is heavily relied upon in your location, consider repairing the system sooner than later. Also, this system works together to clean and protect the windshield When one component fails, the risk of damage to the windshield is elevated. Lack of lubrication, incorrect windshield wiper angle, and worn windshield wiper blades are all causes of streaking, grooving, and scratching the path of the windshield wipers into the windshield.